How to Silence Squeaky Wooden Stairs

Squeaks in wooden stairs are caused by friction. Over time, wood dries out and fasteners loosen, allowing the tread to rub against the riser or the stringer every time you step on it. That annoying creak is simply two pieces of lumber shifting against each other under your weight. Fixing this isn't about hiding the sound; it's about tightening the connection. When you finish this job, your stairs will feel solid and silent underfoot. The secret lies in identifying whether the movement is at the back of the tread or the side, then securing it so movement becomes impossible.

Pinpoint the Noisy Spot. Have someone walk up and down the stairs while you stand nearby to pinpoint exactly which tread is moving. Press down on different parts of the board to see where the gap opens up or the sound originates.
Try the Lubricant Route First. If you cannot access the underside of the stairs, try spraying a dry silicone or powdered graphite lubricant into the seam between the tread and the riser. This often eliminates minor rubbing sounds without needing hardware.
Lock It Down from Above. Use a trim-head screw to fasten the tread to the riser. Drill a small pilot hole at a 45-degree angle through the edge of the tread into the riser, then drive the screw until the head is flush or slightly recessed.
Hide the Fasteners. If you prefer not to see screw heads, use specialized stair-repair screws. These are designed to break off below the wood surface, allowing you to fill the hole with a matching wood plug or putty.
Wedge Stability from Beneath. If you have access to the basement side of the stairs, drive small wooden shims coated in wood glue into the gaps between the riser and the tread. Do not force them too hard, or you might push the tread upward and create a tripping hazard.
Blend and Polish. Once the stairs are silent, fill any remaining screw holes with wood filler that matches the stain of your stairs. Lightly sand the area with fine-grit paper once the filler is fully dry.